CN107002995A - Solid fuel reducing mechanism and its control method - Google Patents
Solid fuel reducing mechanism and its control method Download PDFInfo
- Publication number
- CN107002995A CN107002995A CN201580063286.0A CN201580063286A CN107002995A CN 107002995 A CN107002995 A CN 107002995A CN 201580063286 A CN201580063286 A CN 201580063286A CN 107002995 A CN107002995 A CN 107002995A
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- China
- Prior art keywords
- solid fuel
- reducing mechanism
- pressure
- internal pressure
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/04—Safety devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1003—Processes to make pulverulent fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/008—Feeding devices for pulverulent fuel
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The present invention provides a kind of solid fuel reducing mechanism (100), and it possesses：Air blast portion (30), the air blast portion (30) blows primary air to the inside of shell (11), and the solid fuel that the primary air is used to be crushed by roller (13) is supplied to classification portion (16)；Pressure detecting portion (50), the pressure detecting portion (50) detects the internal pressure of the shell (11) relative to reference pressure；Flow testing division (60), the flow testing division (60) detects the primary air flow blowed inside from air blast portion (30) to shell (11)；Control unit (40), when the internal pressure that pressure detecting portion (50) is detected is more than authorized pressure, and when the primary air flow of flow testing division (60) detection is below regulation flow, the control unit (40) control solid fuel reducing mechanism (100) is changed into halted state.
Description
Technical field
The present invention relates to the solid fuel reducing mechanism and its control method of a kind of pulverized solid fuel.
Background technology
The solid fuels such as coal are crushed at present it is known that having, and are ground into the crushing of the micro mist less than regulation particle diameter
Machine (for example, with reference to patent document 1).
Patent Document 1 discloses when inside there occurs the conflagration that dust explosion state is presented, it will detect that fast
Quick burning burns, and stops the content of pulverizer.Specifically, disclose to the hot gas duct internal pressure that hot gas is supplied inside pulverizer
Power, subtracts pulverizer housing internal upper part pressure, detects pressure differential, when this pressure differential is negative pressure, stops pulverizer.
Prior art literature
Patent document
Patent document 1：Japanese Patent Laid-Open 2002-143714 publications
The content of the invention
Problems to be solved by the invention
Pulverizer disclosed in patent document 1 is that pulverizer housing internal upper part pressure is decreased below using timer
The state timing of pressure reaches and stopped after certain time in hot gas duct.Therefore, before timer is accumulated to certain time, i.e.,
Make that conflagration occurs inside pulverizer, can not also stop pulverizer.
In addition, the pressure detector of detection pulverizer housing internal upper part pressure is configured in the casing that there is micro mist, therefore
Compared to other spaces of no micro mist, easily break down.
However, the pulverizer disclosed in patent document 1, when the pressure detector hair of detection pulverizer housing internal upper part pressure
During raw failure, it is also possible to mistakenly stop pulverizer.
The present invention forms for the exploitation that solves the above problems, and its object is to provide a kind of solid fuel reducing mechanism and its control
Method processed, the solid fuel reducing mechanism can detect the conflagration of internal generation at once, and prevent because fast for detecting
Error detection caused by the detector failures that quick burning burns.
Technical scheme
The present invention is to solve the above problems, employ following methods.
Solid fuel reducing mechanism described in one embodiment of the present invention, is that the solid fuel of pulverized solid fuel is crushed
Device, it possesses：Rotary table, the rotary table is rotated by the driving force from drive division；Roller, the roller will be from
Fuel supplies are crushed supplied to the solid fuel of the rotary table；Classification portion, the classification portion will be by the roller
The solid fuel crushed is classified as the micro-powder fuel less than regulation particle diameter；Shell, the shell storage rotary table,
The roller and the classification portion；Air blast portion, the air blast portion blows primary air to the enclosure, and the primary air is used
The classification portion is supplied in the solid fuel that will be crushed by the roller；Internal pressure test section, internal pressure inspection
Detect the internal pressure of the shell relative to reference pressure in survey portion；Primary air flow test section, the primary air flow
The primary air flow that test section detection is blowed from the air blast portion to the enclosure；Control unit, when the inside
The internal pressure of pressure detecting portion detection is more than authorized pressure, and flow testing division detection is described once empty
When throughput is below regulation flow, the control unit controls the solid fuel reducing mechanism to be changed into halted state.
The solid fuel reducing mechanism according to one embodiment of the present invention, when store rotary table, roller and
When occurring conflagration in the shell in classification portion, conflagration rises enclosure pressure, and causes to blow to shell
The primary air flow in portion is reduced.
The solid fuel reducing mechanism of present embodiment, when the conflagration that enclosure occurs causes enclosure pressure
Rise, relative to reference pressure, reach more than authorized pressure, and primary air flow is reduced, when reaching below regulation flow,
Control solid fuel reducing mechanism is changed into halted state.
The solid fuel reducing mechanism according to one embodiment of the present invention, passes through appropriate setting base pressure respectively
Power, authorized pressure and regulation flow, the conflagration that enclosure occurs can be detected at once.In addition, detecting in shell
Portion's pressure rises and primary air flow is reduced after both situations, and solid fuel reducing mechanism can be changed into halted state, therefore
Even if the test section of either one breaks down, it can also prevent due to conflagration error detection caused by test section failure.It is special
It is not that can prevent due to conflagration error detection caused by internal pressure test section failure, internal pressure test section detection
In the presence of the enclosure pressure of pulverized solid fuel.
Solid fuel reducing mechanism described in one embodiment of the present invention, its structure can be by by the classification part
The micro-powder fuel of level is supplied to the combustor portion for the micro-powder fuel that burns, and the internal pressure test section will have the combustion
The stove internal pressure of the boiler in burner portion detects the enclosure relative to the reference pressure as the reference pressure
Pressure.
Herein, the position of detection enclosure pressure can be the optional position of enclosure.For example, can be by test section
Position is set as the inside in classification portion, or classification portion outside.
According to the solid fuel reducing mechanism of this structure, internal pressure test section regard the stove internal pressure of boiler as base
Quasi- pressure, detects the internal pressure of shell.It is space near combustor portion as the stove internal pressure of the boiler of reference pressure
Pressure, the combustor portion burning from solid fuel reducing mechanism supply micro-powder fuel.The stove internal pressure of boiler with it is outer
Shell internal pressure is synchronous, therefore when occurring conflagration, the enclosure pressure that internal pressure test section is detected has larger
Change.Therefore, according to this structure, it can more effectively detect to there occurs conflagration, and control solid fuel reducing mechanism
It is changed into halted state.
Solid fuel reducing mechanism described in one embodiment of the present invention, its structure can be：The internal pressure inspection
Survey portion atmospheric pressure or vacuum pressure, as reference pressure, are detected into the enclosure pressure relative to the reference pressure.
Thereby, it is possible to using the internal pressure test section of detection gauge pressure or absolute pressure, detect to there occurs conflagration,
And controlling solid fuel reducing mechanism to be changed into halted state, the gauge pressure and absolute pressure regard atmospheric pressure and vacuum as base respectively
It is accurate.
Solid fuel reducing mechanism described in one embodiment of the present invention, can possess temperature detecting part in structure,
The outlet temperature of the micro-powder fuel, the institute detected when the temperature detecting part are discharged in temperature detecting part detection from the shell
When stating outlet temperature to be more than set point of temperature, the control unit controls the solid fuel reducing mechanism to be changed into halted state.
According to this structure, either one or both sides in internal pressure test section and flow testing division all occur therefore
Barrier, or when correctly can not detect there occurs conflagration by internal pressure test section and flow testing division, can also lead to
Excess temperature test section correctly detects to there occurs conflagration.
Solid fuel reducing mechanism described in one embodiment of the present invention, its structure can be：The control unit passes through
Stop the air blast portion and blow the primary air, control the solid fuel reducing mechanism to be changed into halted state.
According to this structure, primary air is blowed by stopping air blast portion, makes primary air needed for buring solid fuel not
Foot, so as to which the solid fuel reducing mechanism is changed into halted state.
Solid fuel reducing mechanism described in one embodiment of the present invention, can possess the fuel supply in structure
Portion, the control unit is by stopping the fuel supplies to the rotary table supply solid fuel, and control is described
Solid fuel reducing mechanism is changed into halted state.
According to this structure, by stopping fuel supplies to rotary table supply solid fuel, make solid fuel not enough,
So as to which the solid fuel reducing mechanism is changed into halted state.
The solid fuel reducing mechanism of said structure, can possess：Runner is supplied, the supply runner is supplied to combustor portion
The micro-powder fuel, and switch valve, the switch valve are arranged at the supply runner, and the control unit is by the way that the switch valve is set
It is set to closed mode, controls the solid fuel reducing mechanism to be changed into halted state.
Thereby, it is possible to prevent high-temperature high-pressure air flow caused by occurring conflagration to combustor portion transmission, and effectively will
Micro-powder fuel and primary air sealing are inside the housing.
The control method of solid fuel reducing mechanism described in one embodiment of the present invention, the solid fuel crushes dress
Put and possess：Rotary table, the rotary table is rotated by the driving force from drive division；Roller, the roller will be from fuel
Supply department crushes supplied to the solid fuel of the rotary table；Classification portion, the classification portion will be crushed by the roller
The solid fuel be classified as micro-powder fuel less than regulation particle diameter；Shell, the shell stores the rotary table, described
Roller and the classification portion；Air blast portion, the air blast portion blows primary air to the enclosure, and the primary air is used for will
The solid fuel crushed by the roller is supplied to the classification portion,
The control method possesses following process：Internal pressure detects process, and internal pressure detection process detection is relative
In the internal pressure of the shell of reference pressure；Flow detection process, the flow detection process detection from the air blast portion to
The primary air flow that the enclosure is blowed；Process is controlled, when described in internal pressure detection process detection
Internal pressure be authorized pressure more than, and the flow detection process detection the primary air flow for regulation flow with
When lower, the control process controls the solid fuel reducing mechanism to be changed into halted state.
The control method of solid fuel reducing mechanism according to one embodiment of the present invention, when being accommodated with rotation work
Conflagration occurs for the enclosure for making platform, roller and classification portion, and enclosure pressure rises, relative to reference pressure, reached
More than authorized pressure, and primary air flow is reduced, when reaching below regulation flow, and control solid fuel reducing mechanism is changed into
Halted state.
The control method of solid fuel reducing mechanism according to one embodiment of the present invention, by appropriately setting respectively
Determine reference pressure, authorized pressure and regulation flow, the conflagration that enclosure occurs can be detected at once.In addition, detection
Go out the rising of shell internal pressure and primary air flow is reduced after both situations, solid fuel reducing mechanism can be changed into stopping shape
State, even if therefore the test section of either one break down, can also prevent due to conflagration mistake caused by test section failure
Detection.It can particularly prevent due to conflagration error detection caused by internal pressure test section failure, internal pressure inspection
There is the enclosure pressure of pulverized solid fuel in the detection of survey portion.
Beneficial effect
In accordance with the invention it is possible to provide a kind of solid fuel reducing mechanism and its control method, the solid fuel crushes dress
The conflagration of internal generation can be detected at once by putting, and be prevented because causing for detecting the detector failures of conflagration
Error detection.
Brief description of the drawings
Fig. 1 is the structure chart of the solid fuel reducing mechanism and boiler that represent one embodiment of the present invention.
Fig. 2 is the flow chart for representing the processing that the solid fuel reducing mechanism of present embodiment is performed.
Fig. 3 is the figure for representing solid combustion supply and enclosure pressure dependence.
Fig. 4 is the figure for representing solid combustion supply and primary air discharge relation.
Embodiment
Below with reference to accompanying drawing, the solid fuel reducing mechanism and its control method of one embodiment of the present invention are carried out
Explanation.
The solid fuel reducing mechanism 100 of present embodiment is to crush the solid fuels such as coal, generates micro-powder fuel, and supply
Should to boiler 200 device.
The solid fuel reducing mechanism 100 of present embodiment possesses：Grinder 10, feeder 20 (fuel supplies), drum
Wind portion 30, switch valve 40, pressure detecting portion 50, flow testing division 60, temperature detecting part 70, nitrogen supply (NS) portion 80 and control
Portion 90.
Grinder 10 has：Shell 11, rotary table 12, roller 13, drive division 14, drive shaft (omit diagram), point
Level portion 16, fuel supplies 17 and motor 18.
Shell 11 is created as the cylindrical shape being extends in the vertical direction, and stores rotary table 12, roller 13, classification portion
16 and the casing of fuel supplies 17.
Rotary table 12 is the vertical view round member rotated by the driving force from drive division 14, by fuel supplies
17 supply solid fuels.
The outside plurality of positions of rotary table 12 is provided with blow-off outlet (omitting diagram), the blow-off outlet makes from once empty
The superjacent air space for primary air flows rotary table 12 into shell 11 that flow channel 100a is flowed into.Leaf is provided with above blow-off outlet
Piece (omits diagram), and it applies rotating force to the primary air blown out from blow-off outlet.The one of rotating force has been applied in by blade
Secondary air, is changed into the air-flow with convolution velocity component, guides the solid fuel crushed on rotary table 12 into shell 11
The classification portion 16 of top.In addition, in the solid fuel crushed material mixed in primary air, the larger object of particle diameter is in arrival point
Dropped before level portion 16, again return to rotary table 12.
Roller 13 is the rotary body for being crushed the solid fuel supplied from fuel supplies 17 to rotary table 12.
Roller 13 is pressed into the peripheral part of rotary table 12, and cooperate pulverized solid fuel with rotary table 12.
In Fig. 1,1 roller 13 is only denoted, but really in the way of pressing the peripheral part of rotary table 12, in week
Certain intervals are vacated upwards, configure multiple rollers 13.For example, vacating 120 ° of angle interval on peripheral part, 3 rollers are configured
13.Now, the part (part of pressing) that 3 rollers 13 are contacted with the peripheral part of rotary table 12, from rotary table 12
The distance of the heart is equal.
Drive division 14 is to transmit revolving force via driving axial rotary table 12, rotary table is rotated around central shaft
Device.
Classification portion 16 is that the solid fuel crushed by roller 13 is classified as to the micro mist less than regulation particle diameter (such as 75 μm)
The device of fuel.Classification portion 16 possesses the multiple classification wings rotated centered on the cylinder axis of generally cylindrical shaped shell 11.
The classification wing in 18 pairs of classification portions 16 of motor applies driving force, it is rotated centered on the cylinder axis of shell 11.
The solid fuel crushed material in classification portion 16 is reached, the centrifugal force and primary air gas produced by being classified wing rotation
The relative equilibrium of centripetal force produced by stream, guides the micro-powder fuel less than regulation particle diameter into outlet 19.
The micro-powder fuel being classified by classification portion 16 is expelled to supply runner 41 from outlet 19.Flow out to supply runner 41
Micro-powder fuel passes through switch valve 40, supplied to the combustor portion 220 of boiler 200.
The solid fuel put into from top is supplied to rotation by fuel supplies 17 to be installed in the form of the upper end of shell 11
The center of revolving worktable 12.Fuel supplies 17 are to supply solid fuel by feeder 20.
Feeder 20 has hopper 21, delivery section 22 and motor 23.The driving that delivery section 22 is applied by motor 23
Power, conveys the solid fuel discharged from the bottom of hopper 21, and guide the fuel supplies 17 of grinder 10 into.
Air blast portion 30 is to blow primary air to the device inside shell 11, and the primary air is used to crush on roller 13
Solid fuel be supplied to classification portion 16.
Air blast portion 30 possesses hot air blower 30a, cold air air blower 30b, hot gas air door 30c and cold air air door 30d.
Hot air blower 30a is the air blower for having heated primary air for blowing heat exchanger supply.In hot air blower
30a downstream is provided with hot gas air door 30c.Hot gas air door 30c aperture is controlled by control unit 90.According to hot gas air door
30c aperture, determines the primary air flow that hot air blower 30a is blowed.
Cold air air blower 30b is the air blower for blowing normal temperature extraneous air as primary air.Cold air air blower 30b's
Downstream is provided with cold air air door 30d.Cold air air door 30d aperture is controlled by control unit 90.According to opening for cold air air door 30d
Degree, determines the primary air flow that cold air air blower 30b is blowed.
Switch valve 40 is disposed on supplying the valve of runner 41, and supply runner 41 will be supplied from the micro-powder fuel of the discharge of outlet 19
To combustor portion 220.Switch valve 40 controls a certain state that it is in open mode or closed mode by control unit 90.
Pressure detecting portion 50 is sensor of the detection relative to the internal pressure of shell 11 of basic pressure.Pressure detecting portion 50
Using the internal pressure of stove 210 of boiler 200 as reference pressure, the internal pressure of shell 11 is detected.Therefore, it is as shown in Figure 1
Pressure detecting portion 50 turns into the sensor of the internal pressure of stove 210 of detection boiler 200 and the difference of the internal pressure of shell 11 pressure.
Pressure detecting portion 50 is by the pressure difference of the internal pressure of stove 210 of the boiler 200 detected and the internal pressure of shell 11
Export to control unit 90.
Flow testing division 60 is the sensor for detecting primary air flow, and the primary air is air blast portion 30 via once empty
Flow channel 100a is to the primary air blowed inside shell 11.Flow testing division 60 is configured at primary air runner by detection
The 100a upper lateral pressure of throttle orifice 61 and the pressure difference of dirty measuring pressure, detects the primary air through primary air runner 100a
Flow.
Flow testing division 60 exports the primary air flow through primary air runner 100a detected to control unit
90。
Temperature detecting part 70 is the sensor that the temperature of runner 41 is nearby supplied in detection outlet 19.Temperature detecting part 70 detect from
The temperature of the micro-powder fuel of the discharge of outlet 19, and export to control unit 90.
Nitrogen supply (NS) portion 80 has nitrogen supply (NS) source 81 and adjustment valve 82.Control unit 90 can adjust valve 82 by control,
Adjust nitrogen (inert gas) amount supplied to primary air runner 100a.When conflagration, control occur for the inside of shell 11
, can be to primary air runner in order to stop conflagration when portion 90 makes the transition of solid fuel reducing mechanism 100 for halted state
100a the supply of nitrogen.
In addition, though more than record in, nitrogen supply (NS) portion 80 be to primary air runner 100a the supply of nitrogen, but
Can not be via primary air runner 100a, but be supplied directly into inside the shell 11 of solid fuel reducing mechanism 100.
Control unit 90 is the device for controlling each several part of solid fuel reducing mechanism 100.Control unit 90 is by drive division 14
Pass on driving to indicate, control the rotating speed of rotary table 12.In addition, control unit 90 can be by passing to the motor 23 of feeder 20
Indicated up to rotating speed, the conveying solid substance fuel of delivery section 22, solid fuel supply of the adjustment supplied to fuel supplies 17.
Control unit 90 can control hot gas air door 30c's and cold air air door 30d by passing on aperture to indicate to air blast portion 30
Aperture.
Also, control unit 90 by switch valve 40 pass on switch indicate, can controlling switch valve 40 be in open mode
Or a certain state in closed mode.
Control unit 90 can control to adjust the aperture of valve 82 by passing on aperture to indicate to nitrogen supply (NS) portion 80.
Next, being burnt for the micro-powder fuel for the supply of reducing mechanism 100 that uses solid fuel and producing steam
Boiler 200 is illustrated.
Boiler 200 possesses stove 210 and combustor portion 220.
Combustor portion 220 is to use primary air and 2 air, the device for making micro-powder fuel burn, the primary air bag
The micro-powder fuel that the runner 41 containing supply is supplied, 2 air (omit and illustrated) supply by heat exchanger.Micro-powder fuel is in stove 210
Interior burning, the burning gases of high temperature are passed through after energy-saving appliance (omitting diagram), discharge the outside of boiler 200.
The burning gases discharged from boiler 200 are sent to heat exchanger (omitting diagram), and heat exchange is carried out with extraneous air.
By the extraneous air heated with burning gases heat exchange in heat exchanger, it is sent in above-mentioned hot air blower 30a.
The water of heating is entered by evaporator (omit and illustrate) and superheater (omit and illustrate) in energy-saving appliance (omitting diagram)
One step is heated, and becomes steam, is sent to steam turbine (omitting diagram).
Next, for during generation conflagration, conflagration being detected at once, and solid fuel is crushed dress in shell
The processing that 100 transition are halted state is put to illustrate.
Every processing in flow chart shown in Fig. 2 is read and performed by control unit 90 and stored in storage part (omitting diagram)
Control program carry out.Hereinafter, illustrated for every processing in flow chart shown in Fig. 2.
In step S201, control unit 90 receives the detection signal of the internal pressure of shell 11 from pressure detecting portion 50, and detection is outer
The internal pressure of shell 11.
In step S202, control unit 90 receives the detection for the primary air flow for flowing into shell 11 from flow testing division 60
Signal, detects the flow of primary air.
In step S203, control unit 90 receives the temperature detection letter of the outlet 19 of grinder 10 from temperature detecting part 70
Number, detect the temperature of the outlet 19 of grinder 10.
In step S204, whether the internal pressure of the shell 11 detected in the determination step S201 of control unit 90 is regulation
It is more than pressure.When control unit 90 judges that it is more than authorized pressure, step S205 processing, on the contrary then progress step S207 are carried out
Processing.
Herein, whether control unit 90 judges the internal pressure of shell 11 as regulation pressure based on threshold value shown in solid in Fig. 3
It is more than power.Specifically, control unit 90 is according to current solid fuel supply (t/h), and reference picture 3 determines the inside of shell 11
Pressure threshold, when the internal pressure of shell 11 detected in step S201 is more than the threshold value, step S204 be determined as be.
Threshold value shown in solid is to judge whether that execution makes solid fuel reducing mechanism 100 transit to halted state in Fig. 3
Transition processing value.Threshold value shown in solid is by solid fuel supply (t/h) and the internal pressure (base of shell 11 in Fig. 3
Quasi- pressure is the internal pressure of stove 210) set up the value of association.
Value shown in dotted lines in Figure 3 represents the operating actual achievement of solid fuel reducing mechanism 100, is by solid fuel supply
And the internal pressure of shell 11 (reference pressure is the internal pressure of stove 210) sets up the value of association (t/h).
Threshold value shown in solid is compared to the value shown in dotted line in Fig. 3, and the internal pressure of shell 11 is higher.Therefore, it is solid at certain
Fluid fuel supply (t/h) place, when the internal pressure of shell 11 is higher than threshold value shown in solid in Fig. 3, is represented inside shell 11
Occurs conflagration.
In step S205, the primary air flow of the inflow shell 11 detected in the determination step S202 of control unit 90 is
No is below regulation flow.Control unit 90 judges it when providing below flow, carries out step S206 processing, on the contrary then carry out
Step S207 processing.
Herein, control unit 90 is based on threshold value shown in solid in Fig. 4, and whether the primary air flow of judgement inflow shell 11
Below regulation flow.Specifically, control unit 90 is according to current solid fuel supply (t/h), and reference picture 4 determines to flow into
The primary air flow threshold value of shell 11, when the primary air flow that step S202 is detected is below the threshold value, step
S205 is determined as.
Threshold value shown in solid is to judge whether that execution makes solid fuel reducing mechanism 100 transit to halted state in Fig. 4
Transition processing value.Threshold value shown in solid is by solid fuel supply (t/h) and flows into the once empty of shell 11 in Fig. 4
Throughput sets up the value of association.
Value shown in dotted lines in Figure 4 represents the control targe value run well, is by solid fuel supply (t/h) and stream
The primary air flow for entering shell 11 sets up the value of association.
Threshold value shown in solid is compared to the value shown in dotted line in Fig. 4, and the flow of primary air is lower.Therefore, in certain solid
Fuel duty (t/h) place, when primary air flow is less than threshold value shown in solid in Fig. 4, represents to send out inside shell 11
Raw conflagration, reached can not ample supply primary air to shell 11 state.
The pressure that pressure detecting portion 50 is detected in step s 201 is more than authorized pressure, and flow is examined in step S202
The primary air flow that survey portion 60 is detected is provides below flow, therefore in step S206, control unit 90, which is performed, fires solid
Feed powder crushing device 100 transits to the transition processing of halted state.That is, control unit 90 judges that the inside of shell 11 there occurs fast quick burning
Burn, solid fuel reducing mechanism 100 is transitted into halted state.
In step S206, the hot gas air door 30c in air blast portion 30 and cold air air door 30d are set to off shape by control unit 90
State, stops air blast portion 30 and blows primary air.
In addition, the control adjustment valve 82 of control unit 90, sets it to open mode, so as to supply nitrogen to the inside of shell 11
Gas (inert gas).
In addition, control unit 90 stops the motor 23 of feeder 20, and stop fuel supplies 17 to rotary table 12
Supply solid fuel.
In addition, the controlling switch valve 40 of control unit 90 is changed into closed mode.
In addition, control unit 90 controls drive division 14, rotary table 12 is set to stop the rotation.
As above, control unit 90 is by making each several part of solid fuel reducing mechanism 100 transit to halted state, so that solid
The integral transition of fluid fuel reducing mechanism 100 is to halted state.In addition, the transition processing for transitting to halted state can carry out it is various
Alarm.
In step S207, whether control unit 90 judges the temperature of the outlet 19 of grinder 10 more than set point of temperature.Control
When portion 90 processed judges that it is more than set point of temperature, step S206 processing, processing that is on the contrary then carrying out step S201 again are carried out.
Even if the testing result of pressure detecting portion 50 and the testing result of flow testing division 60 are not all found inside shell 11
Conflagration, if when the outlet 19 of grinder 10 reaches high temperature (such as more than 100 DEG C) of more than set point of temperature, step
S207 is to judge to there occurs conflagration inside shell 11, solid fuel reducing mechanism 100 is transitted to halted state.For example,
When one or both in pressure detecting portion 50 and flow testing division 60 breaks down, step S207 processing is effective.
The functions and effects reached below for the solid fuel reducing mechanism 100 of present embodiment described above are entered
Row explanation.
According to the solid fuel reducing mechanism 100 of present embodiment, when storage rotary table 12, roller 13 and classification portion
When occurring conflagration in 16 shell 11, conflagration rises the internal pressure of shell 11, and causes to blow to shell 11
Internal primary air flow is reduced.
The solid fuel reducing mechanism 100 of present embodiment, when the conflagration that the inside of shell 11 occurs causes shell 11
Internal pressure rises, and relative to reference pressure (internal pressure of stove 210), reaches more than authorized pressure, and primary air
Flow is reduced, when reaching below regulation flow, and control solid fuel reducing mechanism 100 is changed into halted state.
According to the solid fuel reducing mechanism 100 of present embodiment, pass through appropriate setting reference pressure (stove 210 respectively
Internal pressure), authorized pressure (threshold value shown in Fig. 3) and regulation flow (threshold value shown in Fig. 4), shell 11 can be detected at once
The conflagration that inside occurs.In addition, detecting that the internal pressure of shell 11 rises and primary air flow reduces both situations
Afterwards, solid fuel reducing mechanism 100 can be changed into halted state, even if therefore the test section of either one break down, can also prevent
Only due to conflagration error detection caused by test section failure.It can particularly prevent because the failure of pressure detecting portion 50 causes
Conflagration error detection, the inside of shell 11 that the internal pressure test section 50 detection has pulverized solid fuel is pressed
Power.
In addition, according to the solid fuel reducing mechanism 100 of present embodiment, pressure detecting portion 50 is by the stove of boiler 200
210 internal pressures detect the internal pressure of shell 11 as reference pressure.In stove 210 as the boiler 200 of reference pressure
Portion's pressure is the pressure in space near combustor portion 220, and the combustor portion 220 is burnt supplies from solid fuel reducing mechanism 100
Micro-powder fuel.The internal pressure of stove 210 of boiler 200 is synchronous with the internal pressure of shell 11, therefore when occurring conflagration, pressure
The internal pressure of shell 11 that power test section 50 is detected is more big changes.Therefore, according to present embodiment, can effectively it examine
Measure and there occurs conflagration, and control solid fuel reducing mechanism 100 to be changed into halted state.
In addition, in the solid fuel reducing mechanism 100 of present embodiment, the outlet 19 detected when temperature detector 70
When temperature is more than set point of temperature, the control solid fuel of control unit 90 reducing mechanism 100 is changed into halted state.
According to present embodiment, either one or both sides in pressure detecting portion 50 and flow testing division 60 send out
Raw failure, or when correctly can not detect there occurs conflagration by pressure detecting portion 50 and flow testing division 60, also can
Enough correctly detect to there occurs conflagration by temperature detecting part 70.
In the solid fuel reducing mechanism 100 of present embodiment, control unit 90 is blowed once by stopping air blast portion 30
Air, control solid fuel reducing mechanism 100 is changed into halted state.
According to present embodiment, primary air is blowed by stopping air blast portion 30, is made needed for buring solid fuel once
Lack of air, so as to which solid fuel reducing mechanism 100 is changed into halted state.
In the solid fuel reducing mechanism 100 of present embodiment, control unit 90 is by stopping fuel supplies 17 to rotation
Revolving worktable 12 supplies solid fuel, and control solid fuel reducing mechanism 100 is changed into halted state.
According to present embodiment, by stopping fuel supplies 17 to the supply solid fuel of rotary table 12, make solid
Fuel shortage, so as to which solid fuel reducing mechanism 100 is changed into halted state.
The solid fuel reducing mechanism 100 of present embodiment possesses：Combustion will be supplied to from the micro-powder fuel of the discharge of outlet 19
The supply runner 41 in burner portion 220, and it is arranged at the switch valve 40 of supply runner 41.Also, control unit 90 is by by switch valve
40 are set to off state, and control solid fuel reducing mechanism 100 is changed into halted state.
Thereby, it is possible to prevent high-temperature high-pressure air flow caused by occurring conflagration to the transmission of combustor portion 220, and effectively
Micro-powder fuel and primary air are sealed in inside shell 11.
(other embodiment)
In described above, the internal pressure of stove 210 of boiler 200 as reference pressure, but also may be used by pressure detecting portion 50
To be used as reference pressure using other pressure.It is for instance possible to use atmospheric pressure or vacuum pressure are used as reference pressure.
Thereby, it is possible to using the pressure detecting portion 50 of detection gauge pressure or absolute pressure, detect to there occurs conflagration, and
Control solid fuel reducing mechanism 100 is changed into halted state, and the gauge pressure and absolute pressure regard atmospheric pressure and vacuum as base respectively
It is accurate.
Symbol description
10 grinders
11 shells
12 rotary tables
13 rollers
14 drive divisions
16 classification portions
17 fuel supplies
20 feeders
30 air blast portions
30a hot air blowers
30b cold air air blowers
30c hot gas air doors
30d cold air air doors
40 switch valves
50 pressure detecting portions (internal pressure test section)
60 flow testing divisions
61 throttle orifices
70 temperature detecting parts
82 adjustment valves
90 control units
100 solid fuel reducing mechanisms
100a primary air runners
200 boilers
220 combustor portions
Claims (8)
1. a kind of solid fuel reducing mechanism, it is the solid fuel reducing mechanism of pulverized solid fuel,
Possess：Rotary table, the rotary table is rotated by the driving force from drive division；
Roller, the roller crushes the solid fuel from fuel supplies supplied to the rotary table；
The solid fuel crushed by the roller is classified as firing less than the micro mist of regulation particle diameter by classification portion, the classification portion
Material；
Shell, the shell stores the rotary table, the roller and the classification portion；
Air blast portion, the air blast portion blows primary air to the enclosure, and the primary air is used for will be by the rolling
The solid fuel that wheel is crushed is supplied to the classification portion；
Internal pressure test section, internal pressure of the internal pressure test section detection relative to the shell of reference pressure；
Flow testing division, the primary air that the flow testing division detection is blowed from the air blast portion to the enclosure
Flow；
Control unit, the internal pressure detected when the internal pressure test section is more than authorized pressure, and the flow
When the primary air flow of test section detection is below regulation flow, the control unit controls the solid fuel to crush dress
Put and be changed into halted state.
2. solid fuel reducing mechanism according to claim 1, wherein, by the micro-powder fuel of classification part level
Supplied to the combustor portion for the micro-powder fuel that burns,
The internal pressure test section using the stove internal pressure of the boiler with the combustor portion as the reference pressure,
Detect the enclosure pressure relative to the reference pressure.
3. solid fuel reducing mechanism according to claim 1, wherein, the internal pressure test section by atmospheric pressure or
Vacuum pressure detects the enclosure pressure relative to the reference pressure as reference pressure.
4. solid fuel reducing mechanism according to any one of claim 1 to 3, wherein, possess temperature detecting part, it is described
The outlet temperature of the micro-powder fuel is discharged in temperature detecting part detection from the shell,
When the outlet temperature that the temperature detecting part is detected is more than set point of temperature, the control unit controls the solid
Fuel reducing mechanism is changed into halted state.
5. solid fuel reducing mechanism according to any one of claim 1 to 4, wherein, the control unit is by stopping
The air blast portion blows the primary air, controls the solid fuel reducing mechanism to be changed into halted state.
6. solid fuel reducing mechanism according to any one of claim 1 to 5, wherein, possess the fuel supplies,
The control unit is by stopping the fuel supplies to the rotary table supply solid fuel, and control is described
Solid fuel reducing mechanism is changed into halted state.
7. the solid fuel reducing mechanism according to any one of claim 5 or 6, wherein, possess：Runner is supplied, it is described
Supply runner and supply the micro-powder fuel to combustor portion, and
Switch valve, the switch valve is arranged at the supply runner,
The control unit controls the solid fuel reducing mechanism to be changed into stopping by the way that the switch valve is set to off into state
State.
8. a kind of control method of solid fuel reducing mechanism, the solid fuel reducing mechanism possesses：Rotary table, it is described
Rotary table is rotated by the driving force from drive division；Roller, the roller will be supplied to the rotation from fuel supplies
The solid fuel of revolving worktable is crushed；Classification portion, the classification portion divides the solid fuel crushed by the roller
Level is less than the micro-powder fuel of regulation particle diameter；Shell, the shell stores the rotary table, the roller and the classification
Portion；Air blast portion, the air blast portion blows primary air to the enclosure, and the primary air is used for will be by the roller
The solid fuel crushed is supplied to the classification portion,
The control method possesses following process：Internal pressure detects process, internal pressure detection process detection relative to
The internal pressure of the shell of reference pressure；
Flow detection process, flow detection process detection from the air blast portion to described in the enclosure is blowed once
Air mass flow；
Process is controlled, when the internal pressure detects the internal pressure of process detection to be more than authorized pressure, and it is described
When the primary air flow of flow detection process detection is below regulation flow, the control process controls the solid combustion
Feed powder crushing device is changed into halted state.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-241591 | 2014-11-28 | ||
| JP2014241591A JP6345580B2 (en) | 2014-11-28 | 2014-11-28 | Solid fuel pulverizer and control method thereof |
| PCT/JP2015/073726 WO2016084436A1 (en) | 2014-11-28 | 2015-08-24 | Solid fuel pulverizing device and method for controlling same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107002995A true CN107002995A (en) | 2017-08-01 |
| CN107002995B CN107002995B (en) | 2019-02-22 |
Family
ID=56074017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580063286.0A Active CN107002995B (en) | 2014-11-28 | 2015-08-24 | Solid fuel grinding device and its control method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10603673B2 (en) |
| JP (1) | JP6345580B2 (en) |
| KR (1) | KR101891454B1 (en) |
| CN (1) | CN107002995B (en) |
| DE (1) | DE112015005363T5 (en) |
| WO (1) | WO2016084436A1 (en) |
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| CN109622148A (en) * | 2017-10-03 | 2019-04-16 | 三菱日立电力系统株式会社 | The control method of solid fuel grinding device and solid fuel grinding device |
| CN109751614A (en) * | 2017-11-02 | 2019-05-14 | 三菱日立电力系统株式会社 | Solid fuel feedway and its method of operation and combustion apparatus |
| CN109746084A (en) * | 2017-11-02 | 2019-05-14 | 三菱日立电力系统株式会社 | The method of operation of pulverizer and pulverizer |
| CN111032222A (en) * | 2017-08-25 | 2020-04-17 | 三菱日立电力系统株式会社 | Pulverizer and operation method of pulverizer |
| CN111482242A (en) * | 2019-01-25 | 2020-08-04 | 三菱日立电力系统株式会社 | Solid fuel pulverizer, power generation facility provided with same, and control method therefor |
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| CN114669389B (en) * | 2022-03-01 | 2024-01-02 | 苏州西热节能环保技术有限公司 | Primary air pressure control method and device for coal mill, storage medium and electronic equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| US10603673B2 (en) | 2020-03-31 |
| DE112015005363T5 (en) | 2017-08-10 |
| CN107002995B (en) | 2019-02-22 |
| WO2016084436A1 (en) | 2016-06-02 |
| US20170320066A1 (en) | 2017-11-09 |
| KR101891454B1 (en) | 2018-08-23 |
| KR20170073652A (en) | 2017-06-28 |
| JP6345580B2 (en) | 2018-06-20 |
| JP2016102621A (en) | 2016-06-02 |
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